No Power: Ayu2 Failure - Sony KDL-40W900A Service Manual
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Also See for KDL-40W900A:
- Operating instructions manual (60 pages) ,
- Operating instructions manual (32 pages) ,
- Operating instructions manual (32 pages)
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Troubleshooting
3-1-3. No POWER: Ayu2 Failure
AYU2 Fail Suspected
AYU2 is working,
but specific block fails;
like no picture,
I/O damage etc
I/O damage, etc
No
AYU2 LOG is displayed
No
No
AYU2 power is OK
No
Software was written
Software was written
successful ly
at least one time
No
Replace Ayu2
Yes
See AYU2
replacement flow
Y
Yes
Check DDR
Find Some
using CheckSW
Error message
Yes
DDR device fail
DDR d
From the error
Yes
Check
message, we can
DDR & RawNAND
find which device
interface
has failure.
has failure.
Move to device
analysis phase.
Yes
es
Replace both
AYU2 & RawNAND
No
N
Check RawNAND
using CheckSW
No
i
f il
RawNAND data fail
R
NAND d t f il
Data fails are
especially in
environment area.
If this Area has
If thi A
h
broken, check soft
cannot run
Store Error
message.
Yes
Find Some
If it is
Error message
unacceptable
Errors,
No
it is RawNAND
device failure
device failure
Store SW log,
Check SW behaviors.
Erase RawNAND
Erase RawNAND
In this case,
corrupted data are
written to NAND
flash in proper
way.
So, we have to
check the logs of
exception or errors.
Erase RawNAND
Erase RawNAND
Note:
Note:
is a last option.
(AYU2) – IC9000
(Brownie)- IC9001
RB1G
CHASSIS
W900A/904A/905A
33
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Troubleshooting
